Added the functionality to save the point cloud and the objects' information at same time.
Draw a sphere arround the point picked by the user
Allow the user to do the segmentation only once. Redefine the undo action after the segmentation.
Also solve the issue with the coordinate system (add and remove incorrectly).
Resolve some bugs in the mainwindow as annotating object without plane segmentation. Also for the view interactor, new functions has been implemented.